win定时器 CreateTimerQueueTimer
最近使用iocp,需要定时器检测客户端是否过期,之前使用一个线程专门做检查,感觉不合适,可以采用定时器
CreateTimerQueueTimer
参考MSDN上的信息
https://docs.microsoft.com/en-us/previous-versions/windows/desktop/legacy/ms687066(v=vs.85)
https://docs.microsoft.com/en-us/windows/win32/sync/using-timer-queues
总结下来是四个函数调用和一个传入函数
//官方的案例
#include <windows.h> #include <stdio.h> HANDLE gDoneEvent; VOID CALLBACK TimerRoutine(PVOID lpParam, BOOLEAN TimerOrWaitFired) { if (lpParam == NULL) { printf("TimerRoutine lpParam is NULL\n"); } else { // lpParam points to the argument; in this case it is an int printf("Timer routine called. Parameter is %d.\n", *(int*)lpParam); if(TimerOrWaitFired) { printf("The wait timed out.\n"); } else { printf("The wait event was signaled.\n"); } } SetEvent(gDoneEvent); } int main() { HANDLE hTimer = NULL; HANDLE hTimerQueue = NULL; int arg = 123; // Use an event object to track the TimerRoutine execution gDoneEvent = CreateEvent(NULL, TRUE, FALSE, NULL); if (NULL == gDoneEvent) { printf("CreateEvent failed (%d)\n", GetLastError()); return 1; } // Create the timer queue. hTimerQueue = CreateTimerQueue(); if (NULL == hTimerQueue) { printf("CreateTimerQueue failed (%d)\n", GetLastError()); return 2; } // Set a timer to call the timer routine in 10 seconds. if (!CreateTimerQueueTimer( &hTimer, hTimerQueue, (WAITORTIMERCALLBACK)TimerRoutine, &arg , 10000, 0, 0)) { printf("CreateTimerQueueTimer failed (%d)\n", GetLastError()); return 3; } // TODO: Do other useful work here printf("Call timer routine in 10 seconds...\n"); // Wait for the timer-queue thread to complete using an event // object. The thread will signal the event at that time. if (WaitForSingleObject(gDoneEvent, INFINITE) != WAIT_OBJECT_0) printf("WaitForSingleObject failed (%d)\n", GetLastError()); CloseHandle(gDoneEvent); // Delete all timers in the timer queue. if (!DeleteTimerQueue(hTimerQueue)) printf("DeleteTimerQueue failed (%d)\n", GetLastError()); return 0; }
// 自己抽离出来的案例
#include <windows.h> #include <stdio.h> //创建队列 HANDLE hTimer = hTimerQueue = CreateTimerQueue(); if (NULL == hTimerQueue) { printf("CreateTimerQueue failed (%d)\n", GetLastError()); return 2; } //启动一个定时器, 此处第一个10000意思是10秒后启动一次回调函数,如果为0,则表示立即启动 此处第二个10000表示这个定时器每过10秒启动一次,为0则表示这个定时器只启动一次, 如果这两个值相同则第一次定时时间到了,经过测试,回调函数只启动一次,不会启动两次 HANDLE hTimer = NULL; int arg = 123; if (!CreateTimerQueueTimer( &hTimer, hTimerQueue, (WAITORTIMERCALLBACK)TimerRoutine, &arg , 10000, 10000, 0)) { printf("CreateTimerQueueTimer failed (%d)\n", GetLastError()); return 3; } //删除其中一个定时器 if(!DeleteTimerQueueTimer(hTimerQueue,hTimer,NULL)) printf("DeleteTimerQueueTimer failed (%d)\n", GetLastError()); //关闭定时器队列 if (!DeleteTimerQueue(hTimerQueue)) printf("DeleteTimerQueue failed (%d)\n", GetLastError()); //调用的函数 TimerOrWaitFired 如果是正常的 timerOut 则为true ,如果是不正常的被关闭了,则为 false VOID CALLBACK TimerRoutine(PVOID lpParam, BOOLEAN TimerOrWaitFired) { if (lpParam == NULL) { printf("TimerRoutine lpParam is NULL\n"); } else { // lpParam points to the argument; in this case it is an int printf("Timer routine called. Parameter is %d.\n", *(int*)lpParam); if(TimerOrWaitFired) { printf("The wait timed out.\n"); } else { printf("The wait event was signaled.\n"); } } }
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